CVE-2026-86285

BookStack versions up to 26.05.2 are affected by an improper access control vulnerability in the Attachment Edit Endpoint , specifically the AttachmentController::getUpdateForm function in app/Uploads/Controllers/AttachmentController.php. The ID argument can be manipulated to bypass permission ch...

CVE-2026-86285 BookStack Attachment Edit Endpoint AttachmentController.php getUpdateForm access control

A vulnerability was detected in BookStack up to 26.05.2. Affected by this issue is the function AttachmentController::getUpdateForm of the file app/Uploads/Controllers/AttachmentController.php of the component Attachment Edit Endpoint. The manipulation of the argument ID results in improper acces...